Jazz: A whole troupe of New York City jazz musicians, led by bassist Cecil McBee, sizzle up Greenwich Tavern with an evening of big band sounds. 9 p.m. today, 2442 Gilbert Ave., Walnut Hills. $20. 221-1151.

Book signing: Paullina Simons, author of the mega-selling Tully, signs and discusses her new Bronze Horseman, a romance set in the very unromantic World War II-torn Russia. 7 p.m. today, Joseph-Beth Booksellers, Rookwood Pavilion, Norwood. 396-8960.

Oldies: And this for baby boomers looking to tap a toe or 10: The oldies cover band American Graffiti does its sha-boom bit in a free outdoor concert. 7 p.m. today, Greenhills Commons, Winton and Ingram roads. 825-8100.

Party in the Park: The popular after-work mixer, complete with live music, cold beer and a ton of people mixing 'n' mingling, has The Rusty Griswolds churning out rock 'n' roll. 5:30-10:30 p.m. today, Sawyer Point. 579-3191.

 TV Critic John Kiesewetter also says school's out for the American High kids, who graduate in a one-hour finale (10 p.m., Channels 48, 54, 16). It follows a repeat of the War & Pieces episode from last week (9:30 p.m.).